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https://issues.apache.org/jira/browse/MAPREDUCE-644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12752723#action_12752723
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Tsz Wo (Nicholas), SZE commented on MAPREDUCE-644:
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Hi Ravi, you may check whether fileCount + dirCount > 0 in DistCp.setup(..) for
unit tests.
If you have already done manual tests, could you "Also please list what manual
steps were performed to verify this patch"?
> distcp does not skip copying file if we are updating single file
> ----------------------------------------------------------------
>
> Key: MAPREDUCE-644
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-644
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: distcp
> Reporter: Ravi Gummadi
> Assignee: Ravi Gummadi
> Attachments: d_singlefile_update.patch
>
>
> distcp doesn't skip copying file when we do -update on single file if the
> destfile already exists.
> When we do
> hadoop distcp -update srcfilename destfilename
> it seems to be comparing checksums of srcfilename and
> destfilename/srcfilename and so skip is not done. It should compare checksums
> of srcfilename and destfilename.
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